Dear all, I have installed Red Hat Enterprise Linux As in my system. I downloaded the ns-allinone-2.28.tat.gz. While installing the all in one, the system said a lot of errors in Xgraph but continued since it is an optional component. Tcl8.4.5 was installed successfully. While installing Tk8.4.5 I got the following message and error: tcl8.4.5 installation succeeded. ============================================================ * Build Tk8.4.5 ============================================================ make: *** No rule to make target `/ns-allinone-2.28/tk8.4.5/unix/Makefile.in', needed by `Makefile'. Stop. loading cache ./config.cache checking for Tcl configuration... (cached) found /ns-allinone-2.28/tcl8.4.5/unix/tclConfig.sh checking for existence of /ns-allinone-2.28/tcl8.4.5/unix/tclConfig.sh... file not found configure: error: /ns-allinone-2.28/tcl8.4.5/unix/tclConfig.sh is for Tcl . Tk 8.4.5 needs Tcl 8.4. Use --with-tcl= option to indicate location of tclConfig.sh file for Tcl 8.4. tk8.3.2 configuration failed! Exiting ... Tk is not part of the ns project. Please see www.Scriptics.com to see if they have a fix for your platform. ----------------------------------------------------------- As I am new to Linux I really dont understand what the error is and dont know what to do.... Anybody please help me in fixing this problem Thanks in Advance S.Rajapriya --------------------------------- Relax. Yahoo! Mail virus scanning helps detect nasty viruses!